@misc{Muhl_John_Adolf_(1879-1943)_Studien,
 author={Muhl, John Adolf (1879-1943)},
 address={Danzig},
 howpublished={online},
 publisher={A. W. Kafemann},
 publisher={W. F. Burau},
 language={ger},
 type={książka},
 title={Studien zur westpreussischen Gütergeschichte, 1-3},
}